how long wall and surface mining are different from each other?
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Answer:
Surface Mining
Explanation:
Surface mining,including strip mining, open –pit
mining and mountaintop removal mining, is a
broad category of mining in which soil and rock
overlying the mineral deposit ( the overburden )
are removed, in contrast to underground
mining, in which the overlying rock is left in
place, and the mineral is removed through
shafts or tunnels.
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